The Inca Empire
The Inca Empire, known as Tawantinsuyu in the Quechua Language, was the largest pre-Columbian empire in the Americas. Arising in the Andes Mountains of Peru, the empire was established in the early 13th century and reached its peak under the ruler Pachacuti. Its administrative, political, and military center was the city of Cusco. The Inca are celebrated for their monumental architecture, particularly Ashlar masonry, which involved cutting stones to fit together precisely without the use of mortar. The most famous example of this is the high-altitude citadel of Machu Picchu.
The empire was remarkably organized despite lacking a formal written language. Instead, they utilized Quipu, a system of knotted strings, to record census data, taxes, and historical events. Their vast territory was linked by the Qhapaq Ñan, an extensive road system covering over 25,000 miles. Agriculture was supported by advanced Terrace Farming and irrigation systems that allowed for the cultivation of Maize and Potatoes. Religion played a central role in society, with the Sapa Inca regarded as the 'Son of the Sun,' worshiping the sun god Inti. More detailed historical overviews are provided by the World History Encyclopedia and the Encyclopedia Britannica.
The downfall of the Inca Empire began with the arrival of Spanish Conquistadors led by Francisco Pizarro in 1532. Exploiting a civil war between the brothers Atahualpa and Huascar, the Spanish Empire eventually executed the last sovereign Inca ruler and dismantled the native administration.